from langchain.prompts import (ChatPromptTemplate, SystemMessagePromptTemplate, HumanMessagePromptTemplate)

template = "You are a helpful assistant that translates {input_language} to {output_language}."
system_message_prompt = SystemMessagePromptTemplate.from_template(template)
human_template = "{text}"
human_message_prompt = HumanMessagePromptTemplate.from_template(human_template)
chat_prompt = ChatPromptTemplate.from_messages([system_message_prompt, human_message_prompt])
resp = chat_prompt.format_prompt(input_language="English", output_language="French",
                                 text="I love programming.").to_messages()
print(resp)
